The Avenue of Processions was a location on the planet Romulus which was situated in the capital. In 2276, Ael t'Rllaillieu told James T. Kirk that if she was successful in defeating the Praetorate, she would have its members marched down the Avenue along with their aides where they were to be executed after which a new group of Praetors were going to be selected to run the Romulan Star Empire. (TOS novel: Swordhunt)